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jzs-10842

Calcareous nannobiostratigraphy of the Hartha Formation, East Baghdad well No.6, Central Iraq

Omar Ahmed Al-Badrani1*, Sanad  A. Al-Khashab1, and Ibrahim Younis Al-Shareefi1

1Department of Geology, College of Science, Mosul University, Mosul, Iraq

*Corresponding author’s e-mail: omarbadrani@uomosul.edu.iq

Original: 1 October 2020 Revised: 20 November 2020 Accepted: 29 November 2020 Published online: 20 June 2021

DOI link: https://doi.org/10.17656/jzs.10842


Abstract

Fifteen  samples of Limestone from the Hartha Formation were obtained from East Baghdad well No.6, Central Iraq, from the depth (2247-2261 meter) about 14 meters thickness. Detail investigation was carried out, from which fifteen  species of calcareous nannofossils identified; eleven were descried from other regions and four were left under an open name because of lack of material or rare of samples. The recorded calcareous nannofossil assemblages recognized two biozones these from the lower to the upper part of the section :

1 - Eiffellithus eximius Interval Zone (CC19) part

2- Ceratolithoides aculeus Interval Zone (CC20) part 

These biozones are correlated with other calcareous nannofossils biozones from both local and regional sections that lead to conclude the age of the Middle Campanian.

Key Words: Calcareous nannofossils, Nannobiostratigraphy, Hartha Formation, Cretaceous, Iraq.  


     References

[1] Al-Badrani, O.A. "Biostratigraphy and paleoecology of Upper Cretaceous Ammonites for the Lower part of Shiranish Formation Northwest Iraq. Unpublished M.Sc.Thesis, University of Mosul 104p. (In Arabic). (2001).

[2] Al-Badrani, O. A. "Nannobiostratiraphy of the Lower part of Shiranish Formation, Sinjar Anticline, NW Iraq". Iraqi National Journal of Earth Sciences. Vol. 12, No. 1, pp. 1-16. (2012).

[3] Al-Badrani, O. A., and Al-Assaf, E. N. "Nannobiostratigraphy of Shiranish Formation in Balad Well No. 8, Northern Baghdad, Iraq". Iraqi National Journal of Earth Sciences. Vol. 11, No. 2, pp. 65-80. (2011).

[4] AL-Badrani, O. A., and AL-Kashab, S. A. "Biostratigraphy and Paleoecology by calcareous nannofossils and Ostracoda of Tanuma Formation, Central Iraq". Iraqi National Journal of Earth Sciences. Vol. 13, No. 2, pp. 33-46. (2013).

[5] Al-Badrani, O. A. and Al-Maamari, M. A. "Calcareous Nannofossils Biostratigraphy of Shiranish Formation (K-306) well, Northern Iraq". Iraqi National Journal of Earth Sciences. Vol. 19, No. 2, pp. 1-10. (2019).

[6] AL-Badrani, O. A., and Mahmood, R. M. "Study of nannolith from Upper Cretaceous Shiranish Formation, Higran area, Northern Iraq". Arbian Journal of Geosciences. Vol. 7, No. 12, pp. 5571-5578. (2014).

[7] Al-Badrani, O. A.; Karim, K. H. and Ismail, K. M. "Nannofossils' biozones of the contact Between kometan and shiranish formations, Chaqchaq valley, Sulaimaniyah, NE Iraq". Iraqi Bulletin of Geology and Mining. Vol.8, No.1, p. 19-29. (2012).

[8] Armstrong, H. and Brasier, M. "Microfossils Black well publishing". 296p. (2005).

[9] Bronnimann, P. "Microfossils incertae sedis rrom the Upper Jurassic and Lower Cretaceous of Cuba". Micropaleontology J. pp 28-51. (1955).

[10] Buday , R.T., and Jassim, S.Z. "The Regional Geology of Iraq. 2, Tectonism, Magmatism and Metamorphism, Baghdad". 352p. (1987).

[11] Bukry, D. "Upper Cretaceous coccoliths from Texas and Europe". The University Kansas Paleontology Contribution, Article 51, (Protista 2), pp. 1-79. (1969).

[12] Chira,C.,Blac,R. and Vulc,A. "Cretaceous calcareous nannofossils from ceru Bacainiti area,Apuseni Mountains". Romania. Acta Paleontologica Romaniae. Vol.4, pp. 89-96. (2004).

[13] Deflandre,G. "Braarudosphaera nov.gen.,type d'une famille nouvelle de Coccolithophorides actuels a elements composites.C.r". Seasnces Acad.Sci.Paris. Vol. 225, pp. 439-41. (1947).

[14] Gartner,S. "Coccoliths and related calcareous nannofossils from upper cretaceous deposits of Texas and Arkansas".Univ. Kans. Paleont. Contrib. Protista, art.1, pp.1-56. (1968).

[15] Gran, H.H. and Braarud, T. "A quantitative study of the phytoplankton in the Bay of Fundy and the Gulf of Maine (including observations on hydrography, chemistry and turbidity)". Journal of the Biological Board of Canada. Vol. 1, pp. 279-467. (1935).

[16] Hill, M.E. "Lower Cretaceous calcareous nannofossils from Texas and Oklahoma". Palaeontologica B. Vol. 156, pp. 103-79. (1976).

[17] Milinte, M.C.  and Bojar, A.V. "Biostratigraphic and isotopic record of the Cenomanian- Turonain deposits in the Ohaba-Ponor Section (SW Hateag, Romania)". Cretaceous Research Vol. 29, pp.1024-1034. (2008).

[18] Owen, R.M.S. and Nasr, S.N. "The stratigraphy of Kuwait-Basrah area". American Association of Petroleum Geologists special publication, Habitat of oil symposium, p.1252-1278. (1958).

[19] Perch-Nielsen, K. "Albian to Pleistocene calcareous nannofossils from the western South Atlantic". Initial Rep. Deep Sea drill. Proj. Vol.39, pp.699- 823. (1977).

[20] Perch-Nielsen,K. "Calcareous nannofossils from the Cretaceous between the North sea and the Mediterranean". In Bolli, H. M., Saundes, J. B., & Perch-Nielsen, K. (eds.), 1985, Plankton stratigraphy. Cambridge University Press, Cambridge, pp.329-426. (1979).

[21] Perch-Nielsen, K. "Mesozoic calcareous nannofossils". In Bolli, H. M., Saundes, J. B., & Perch-Nielsen, K. (eds.), Plankton stratigraphy. Cambridge University Press,Cambridge. pp. 427-554. (1985).

[22] Sissigh, W. "Biostratigraphy of Cretaceous calcareous nannoplankton". Geol. Mjnb. Vol. 56, pp. 37-65. (1977).

[23] Stover, E. "Cretaceous coccoliths and associated nannofossils from France and Netherlands". Micropaleontology. Vol. 12,  No. 2, pp. 133-167. (1966).

[24] Stradner, H. "Vorkommen von Nannofossilien im Mesozoikum und Alttertiär". Erdöl-Zeitschrift. Vol. 77, No. 3, pp. 77-88. (1961).

[25] Stradner, H. "New contributions to Mesozoic stratigraphy by means of nannofossils". Proceedings of the Sixth World Petroleum Congress, Section 1 Paper 4, pp. 167-183. (1963).

[26]Vekshina, V. N. "Coccolithophoridae of the Maastrichtian deposits of the West Sberian lowland". Trudy Sibir. Nauch-Issled. Inst. Geol. Geofiz. Min. Syrya. Vol. 2, pp. 56-81. (1959).

[27] Watkins, D. K., Shfik, S., Shin, I. C. "Calcareous nannofossils from the Cretaceous of the deep Ivorian basin". Proceeding of the ocean drilling program scientific results. Vol. 159, pp. 319-333. (1998).